Patients will be evaluated at scheduled screening and baseline visits. After providing written informed consent to participate in the study, patients will be screened for study eligibility during a screening period of 28 days. Baseline assessment consists of a detailed history of pre-existing diseases, blood tests including disease-specific markers such as ß2-microglobulin, IgG, IgA, IgM, immunofixation from blood and urine, serum free light chains, a bone marrow biopsy, a skeletal survey, an electrocardiogram and a chest X-ray.